Lucky Charms Marshmallow Treats

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Celebrate spring with these easy Lucky Charms Marshmallow Treats. A nearly 1:1 cereal to marshmallow ratio makes them extra gooey.

Matt’s favorite cereal is Lucky Charms. He lived on it when he was a bachelor in college. Cereal 3 meals a day! These days we reserve it for vacation and special occasions (getting old stinks).

Sometimes when I’m craving rice krispie treats, I make Matt happy by making these Lucky Charms Marshmallow Treats instead.

12 lucky charms bars

If you like Lucky Charms, try our Lucky Charms French Toast!

❤️ Why you’ll love this recipe:

  • Ready in about 15 minutes.
  • Colorful for spring and St. Patrick’s Day.
  • Kids love to help make these treats!
ingredients for lucky charms marshmallow treats

🔑 Key Ingredients

There are only 4 ingredients needed for this recipe:

  • Butter. If you use salted butter, it helps to cut down on the sweetness of the cereal and marshmallows. If you only have unsalted butter, add about ¼ teaspoon of salt.
  • Marshmallows. Marshmallow treats work best if you use fresh marshmallows. If you only have stale, you can try putting a slice of bread into the marshmallow bag and sealing it. They may soften up after a day or two. But, for the best results, use fresh marshmallows.
  • Vanilla Extract. For a little warm flavor.
  • Cereal. You can use name brand Lucky Charms or a store brand.

⭐️ Tips for Making Lucky Charms Marshmallow Treats

These sweet cereal bars are super easy to make. Here are just a few tips:

  • Be sure to stir the gently when you add the cereal to avoid crushing the marshmallows and cereal.
  • Also be sure to press gently into the pan to avoid dense and hard bars.
  • If you’re looking for a little something extra, try saving some marshmallows from the cereal to press into the top of the bars, drizzle with white chocolate or add sprinkles.
  • Try flavored Lucky Charms or flavored marshmallows for another variation.
hand pulling marshmallow treat

❓ Can I make these in the microwave?

Sure! Add the butter and marshmallow to a microwave safe bowl. Heat in 30 second increments, stirring between each, until melted and smooth. Continue with the recipe as written.

stack of 3 marshmallow cereal bars
stack of 3 marshmallow cereal bars

Lucky Charms Marshmallow Treats

5 from 4 votes
Celebrate spring with these easy Lucky Charms Marshmallow Treats. A nearly 1:1 cereal to marshmallow ratio makes them extra gooey.
Servings 12
Prep Time 5 minutes
Cook Time 10 minutes

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  • 6 tablespoons salted butter (plus more for pan)
  • 16 ounces miniature marshmallows (8 ½ cups)
  • 1 teaspoon vanilla extract
  • 9 cups Lucky Charms cereal


  • Generously butter a 9×13 inch baking dish. Set aside.
  • In a large pot, melt the butter over low heat. If the heat is up too high, your marshmallow treats may end up hard. Melt it low and slow together.
  • Add the mini marshmallows and heat, stirring often until melted and smooth.
  • Remove from heat and stir in vanilla extract. Mix well and gently stir in the cereal.
  • Using a piece of parchment paper or a buttered rubber spatula, gently press the treats into prepared pan. Allow to set for 30 minutes before cutting into squares.
  • Store at room temperature in an airtight container and eat within 3 days for the best flavor and texture.


The calories shown are based on the recipe making 12 bars, with 1 serving being 1 cereal bar. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate. **We are not dietitians and recommend you seek a nutritionist for exact nutritional information.**


Calories: 274kcal | Carbohydrates: 53g | Protein: 3g | Fat: 7g | Saturated Fat: 4g | Trans Fat: 1g | Cholesterol: 15mg | Sodium: 255mg | Potassium: 64mg | Fiber: 1g | Sugar: 32g | Vitamin A: 937IU | Vitamin C: 7mg | Calcium: 120mg | Iron: 6mg
Course Dessert
Cuisine American
Calories 274
Keyword bake sale, comfort food, spring recipe

Frequently Asked Questions

How do you store marshmallow treats?

Store the bars in an airtight container at room temperature for up to 4 days.

What substitutions can I make?

Unsalted butter can be used in place of salted butter. Regular sized marshmallows can be used in place of the miniature marshmallows, just use a 16 ounce bag of the regular marshmallows.

Can I make this in an 8×8 or 9×9 inch baking dish?

This recipe makes enough to fit well into a 9×13 inch dish. If you would like to use a smaller dish, cut the recipe in half or use 2 baking dishes.

Can these be frozen?

I do not recommend freezing these treats. The cereal doesn’t stand up well to being frozen and thawed.

About JulieJulie Clark

About Julie Clark

I'm Julie Clark, CEO and recipe developer of Tastes of Lizzy T. With my B.A. in Education and over 30 years of cooking and baking, I want to teach YOU the best of our family recipes.

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